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CHEM > CHEM QA > Flashcards

CHEM QA Flashcards

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1
Q

carbonate test

A

add dilute acid; effervescence carobon dioxide produced

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2
Q

chloride

A

acidicify with dilute nitric acid, then add aq silver nitrate; white ppt

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3
Q

iodide

A

acidicify with dilute nitric acid, then add aq silver nitrate; yellow ppt

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4
Q

nitrate

A

add aq sodium hydroxide, then aluminium foil; warm carefully; ammonia produced

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5
Q

sulfate

A

acidifiy with dilute nitric acid, then add aq barium nitrate; white ppt

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6
Q

aluminium/Lead(II)

A

NaOH: White ppt, soluble in excess giving coloourless soln
Aq Ammonia: white ppt, insoluble in excess

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7
Q

ammonium

A

NaOH: ammonia produced on warming

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8
Q

calcium

A

NaOH: White ppt, insoluble in excess
Aq ammonia: no ppt

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9
Q

copper (II)

A

NaOH: Light blue ppt, insoluble in excess
Aq ammonia: soluble in excess giving dark blue soln

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10
Q

Iron (II)

A

NaOH: green ppt; insoluble in excess

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11
Q

Iron (III)

A

NaOH: red brown ppt; insoluble in excess
Aq Ammonia: red brown ppt; insoluble in excess

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12
Q

zinc

A

NaOH: white ppt, soluble in excess giving a colourless soln
Aq ammonia: white ppt, soluble in excess giving a colourless soln

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13
Q

Lead (II) distinguish from Al (III)

A

Add HCl to chloride, look for ppt as lead (II) iS insoluble

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14
Q

Ammonia

A

Turns damp red litmus paper blue

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15
Q

co2

A

gives ppt when bubbed into limewater(ppt dissolved with excess co2)

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16
Q

chlorine

A

bleaches damp litmus paper blue

17
Q

hydrogen

A

pops with lighted splint

18
Q

oxygen

A

relights glowing splint

19
Q

sulfur dioxide

A

turns aq potassium manganate (IV) frm purple to colourless

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